[Er(OH₂)₃(Edta-κ²N,κ⁴O)]⊖

Formula Unicode styled: 
[Er(OH₂)₃(Edta-κ²N,κ⁴O)]⊖
Compound name(s): 
(ethylenediamine-N,N,N',N'-tetra-acetato)-triaqua-erbium(1-)
Central atom: 
Charge on formula unit (QN): 
1–
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Coordination Number (CN, sum of attached group denticities): 
Oxidation Number (ON) (Roman numerals): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Bond number (BN) = 𝘹 + 𝘭 + 𝘻: 
9
[MLXZ]𝘲 class: 
[MX4L5]-
MLXZ class (ENC, equivalent neutral class): 
MX3L6
Summary of calculated classifications: 
Er«V3C9OIIIE29B9Z0X4L5»
𝘥-electron configuration = 𝘮 – VN: 
𝘥-electron configuration = 𝘮 – ON: 
𝘥-electron configuration = 𝘮 – VN – 𝘲 from [MLXZ]𝘲: 
Attached atoms: 
N2O7
Phase: 
InChIKey (see www.inchi-trust.org): 
IWSDGJJBAFNBKM-UHFFFAOYSA-J